The word 'security' is a broad, vague generality whose contours should not be invoked to abrogate the fundamental law embodied in the First Amendment… - Hugo Black

For me, the only correct meaning of that phrase is that our Government must proceed according to the 'law of the land'—that is, according to written constitutional and statutory provisions as interpreted by court decisions.

Again, it is a new doctrine of constitutional law that one indicted for disobedience to an unconstitutional statute may not defend on the ground of the invalidity of the statute, but must obey it though he knows it is no law, and, after he has suffered the disgrace of conviction and lost his liberty by sentence, then, and not before, seek, from within prison walls, to test the validity of the law.

Our Founders were no more willing to let the content of their prayers and their privilege of praying whenever they pleased be influenced by the ballot box than they were to let these vital matters of personal conscience depend upon the succession of monarchs. The First Amendment was added to the Constitution to stand as a guarantee that neither the power nor the prestige of the Federal Government would be used to control, support or influence the kinds of prayer the American people can say -- that the people's religions must not be subjected to the pressures of government for change each time a new political administration is elected to office. Under that Amendment's prohibition against governmental establishment of religion, as reinforced by the provisions of the Fourteenth Amendment, government in this country, be it state or federal, is without power to prescribe by law any particular form of prayer which is to be used as an official prayer in carrying on any program of governmentally sponsored religious activity.